21267585

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{379}}^1$

素因数の和:462

約数の個数: 48

約数和(自身を含む): 39124800

約数和(自身を除く): 17857215

約数列:

[1, 3, 5, 9, 15, 29, 43, 45, 87, 129, 145, 215, 261, 379, 387, 435, 645, 1137, 1247, 1305, 1895, 1935, 3411, 3741, 5685, 6235, 10991, 11223, 16297, 17055, 18705, 32973, 48891, 54955, 56115, 81485, 98919, 146673, 164865, 244455, 472613, 494595, 733365, 1417839, 2363065, 4253517, 7089195, 21267585]

約数ペア:

[(1, 21267585), (3, 7089195), (5, 4253517), (9, 2363065), (15, 1417839), (29, 733365), (43, 494595), (45, 472613), (87, 244455), (129, 164865), (145, 146673), (215, 98919), (261, 81485), (379, 56115), (387, 54955), (435, 48891), (645, 32973), (1137, 18705), (1247, 17055), (1305, 16297), (1895, 11223), (1935, 10991), (3411, 6235), (3741, 5685)]